package org.chapter2.util;

/**
 * Created by james on 16/1/21.
 */

/*
* 转型操作工具类
* */
public final class CastUtil {
    /*
    * 转为String型
    * */
    public static String castString(Object obj){
        return CastUtil.castString(obj,"");
    }

    /*
    * 转为String型(提供默认值)
    * */
    public static String castString(Object obj,String defaultValue){
        return obj != null ? String.valueOf(obj):defaultValue;
    }

    /*
    * 转为double型
    * */
    public static double castDouble(Object obj){
        return CastUtil.castDouble(obj,0);
    }

    /*
    * 转为double型(提供默认值)
    * */
    public static double castDouble(Object obj,double defaultValue){
        double doubleValue = defaultValue;
        if (obj != null){
            String strValue = castString(obj);
            if (StringUtil.isNotEmpty(strValue)){
                try {
                    doubleValue = Double.parseDouble(strValue);
                } catch (NumberFormatException e){
                    defaultValue = defaultValue;
                }
            }
        }
        return doubleValue;
    }

    /*
    * 转为long型
    * */
    public static long castLong(Object obj){
        return CastUtil.castLong(obj,0);
    }

    /*
    * 转为long型(提供默认值)
    * */
    public static long castLong(Object obj,long defaultValue){
        long longValue = defaultValue;
        if (obj != null){
            String strValue = castString(obj);
            if (StringUtil.isNotEmpty(strValue)){
                try{
                    longValue = Long.parseLong(strValue);
                } catch (NumberFormatException e){
                    longValue = defaultValue;
                }
            }
        }
        return longValue;
    }

    /*
    * 转为int型
    * */
    public static int castInt(Object obj){
        return CastUtil.castInt(obj,0);
    }

    /*
    * 转为long型(提供默认值)
    * */
    public static int castInt(Object obj,int defaultValue){
        int intValue = defaultValue;
        if (obj != null){
            String strValue = castString(obj);
            if (StringUtil.isNotEmpty(strValue)){
                try {
                    intValue = Integer.parseInt(strValue);
                } catch (NumberFormatException e){
                    intValue = defaultValue;
                }
            }
        }
        return intValue;
    }

    /*
    * 转为boolean型
    * */
    public static boolean castBoolean(Object obj){
        return CastUtil.castBoolean(obj);
    }

    /*
    * 转为boolean型(提供默认值)
    * */
    public static boolean castBoolean(Object obj,boolean defaultValue){
        boolean booleanValue = defaultValue;
        if (obj != null){
            booleanValue = Boolean.parseBoolean(castString(obj));
        }
        return booleanValue;
    }
}
